CIB W116—Smart and Sustainable Built Environments - Test Input

Table 1: Guidelines for a regional agenda for water sustainability of dwellings
Ratio of demand
to availability
of water
resources
Reference water
Indicator
(L/ person.day)
Reduction target
(%)
Action and impact of reduction (%)
Less than 5%
(Excellent)
5 to 10%
(Comfortable)
10 to 20%
(Worrying)
20 to 40%
(Critical)
180 160 140 120 100
Bigger than
40%
(Very critical)
10 - 30 10 - 30 20 - 40 20 - 45 20 - 50
Environmental education, detection and correction of leakages (not measurable)
Pressure reducing valves
Water saver components
Actions to reduce the volume of sanitation sewage
Water submetering system
(10 - 30) 1
(5 – 20) 1
Pressure reducing valves
Water saver components
(5 – 30) 1 Efficient irrigation
(10 – 30) 1
Plants which consume little water
(1– 5) 1
Alternative source at least in irrigation
(10 – 40) 1
Retention system or infiltration
(not measurable) 2
1 impact of reduction in relation to consumption of the component or conventional system
2 does not reduce the consumption of water although contributes to the reduction of flow rate peaks in
urban drainage systems
To exemplify the application of the guidelines presented in Table 1, a building to be built, which is in
operation in a region in which the ratio of demand to availability of water is worrying (10 to 20%). In
Table 1, the target for reduction is from 20 to 40%. For this, the target can be reached, only with
environmental education, detection and correction of leakages and a water submetering system of
water consumption. With the installation of pressure reducers, a reduction of 10 to 30% can be
reached in the points of consumption, in which this component can be installed and not in the system.
In this case, in order to determine the impact of reduction in the total consumption of water, it is
necessary to estimate a utilization standard in the referred points of consumption.
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